Will mark ! no need to !
what is an ecologist and a biochemist?

Ecology is largely observational, is concerned with interactions between living organisms in their natural habitats, and is carried out in the field. By contrast, biochemistry is experimental, is concerned with interactions at the molecular level, and is carried out at the laboratory bench.

and just put a person that

Ecology is largely observational, is concerned with interactions between living organisms in their natural habitats, and is carried out in the field. By contrast, biochemistry is experimental, is concerned with interactions at the molecular level, and is carried out at the laboratory bench.

hope this helps  you

answer; /// i believe that the correct answer is ( monophasic ); ethinyl estradiol- ethynodiol diacetate is a monophasic oral contraceptive agent; ///